interpreter: use typed_pos_args for join_paths
interpreter: use typed_pos_args for join_paths

pexip/meson,jpakkane/meson,pexip/meson,pexip/meson,jpakkane/meson,pexip/meson,pexip/meson,jpakkane/meson,mesonbuild/meson,mesonbuild/meson,jpakkane/meson,mesonbuild/meson,mesonbuild/meson,pexip/meson,mesonbuild/meson,jpakkane/meson,jpakkane/meson,mesonbuild/meson,jpakkane/meson,pexip/meson,pexip/meson,pexip/meson,jpakkane/meson,mesonbuild/meson,jpakkane/meson,mesonbuild/meson,mesonbuild/meson,pexip/meson,mesonbuild/meson